Philip W Greenfield , WI June 08, 2016 Appliance: Whirlpool Electric Dryer WED6400SW0 Whirlpool Dryer Wed6400sw0: Dryer made a load screeching noise. How to replace Dryer Idler Pulley Assembly. Replaced idler, belt and all 4 drum rollers. Everything fine now. Easy repair. Belt a little pricey but the rest of the parts were very reasonable. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes